Keywords : Tragacanth gum


Water Management within Tragacanth gum-g-polyitaconic Acid Hydrogels

Chetna Verma; Poonam Negi; Deepak Pathania; Sadiya Anjum; Bhuvanesh Gupta

Advanced Materials Letters, 2019, Volume 10, Issue 10, Pages 711-714
DOI: 10.5185/amlett.2019.4090

In our investigation, we have studied the interaction of the water molecules with the hydrophilic sites in itaconic acid grafted Tragacanth gum copolymer. The water existed in two different states within the hydrogel matrix. There is one fraction of water which has close interaction with functional groups and does not undergo freezing during cooling. Besides, this the other type of water undergoes thermal transitions and freezes at -50°C. The water management within the grafted matrix seems to be strongly governed by hydrophilicity, crosslinked density and functionality. The water uptake by the hydrogel increased significantly as the degree of grafting increased, in spite of the increasing crosslink density of the matrix. Results have been explained in terms of the carboxylic groups and their ionization which has an overriding influencing the hydrogel structure leading to a more amenable structure for the water diffusion. Copyright © VBRI Press.

Preparation of novel tragacanth gum-entrapped lecithin nanogels 

Chetna Verma; Poonam Negi; Deepak Pathania; Sadiya Anjum; Bhuvanesh Gupta

Advanced Materials Letters, 2019, Volume 10, Issue 4, Pages 267-269
DOI: 10.5185/amlett.2019.2207

Nanogel synthesis is gaining enormous interest in a large number of applications, such as drug delivery, wound care systems and tissue engineering. In the present work, we have investigated the preparation of Tragacanth gum (TG) nanoparticles in a water-in-oil nanoemulsion system. These nanoparticles exhibit stacked core-shell type of structure in which polygonal TG nanoparticles are covered by lipid structured lecithin (LC). The resultant nanoparticles comprise of amphillic nature, i.e. the hydrophilic TG core and hydrophobic LC shell which offers interesting features of immobilization of biomolecules.